quick_instrumentation_entrypoints.cc revision 507e6180ad271eb719c67ce7394852c731d975a5 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "callee_save_frame.h"
18#include "instruction_set.h"
19#include "instrumentation.h"
20#include "mirror/art_method-inl.h"
21#include "mirror/object-inl.h"
22#include "runtime.h"
23#include "thread-inl.h"
24
25namespace art {
26
27extern "C" const void* artInstrumentationMethodEntryFromCode(mirror::ArtMethod* method,
28                                                             mirror::Object* this_object,
29                                                             Thread* self,
30                                                             StackReference<mirror::ArtMethod>* sp,
31                                                             uintptr_t lr)
32    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
33  FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsAndArgs);
34  instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
35  const void* result;
36  if (instrumentation->IsDeoptimized(method)) {
37    result = GetQuickToInterpreterBridge();
38  } else {
39    result = instrumentation->GetQuickCodeFor(method);
40  }
41  DCHECK((result != Runtime::Current()->GetClassLinker()->GetQuickToInterpreterBridgeTrampoline())
42         || !Runtime::Current()->GetHeap()->HasImageSpace());
43  bool interpreter_entry = (result == GetQuickToInterpreterBridge());
44  instrumentation->PushInstrumentationStackFrame(self, method->IsStatic() ? nullptr : this_object,
45                                                 method, lr, interpreter_entry);
46  CHECK(result != NULL) << PrettyMethod(method);
47  return result;
48}
49
50extern "C" TwoWordReturn artInstrumentationMethodExitFromCode(Thread* self,
51                                                              StackReference<mirror::ArtMethod>* sp,
52                                                              uint64_t gpr_result,
53                                                              uint64_t fpr_result)
54    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
55  // TODO: use FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsOnly) not the hand inlined below.
56  //       We use the hand inline version to ensure the return_pc is assigned before verifying the
57  //       stack.
58  // Be aware the store below may well stomp on an incoming argument.
59  Locks::mutator_lock_->AssertSharedHeld(self);
60  Runtime* runtime = Runtime::Current();
61  sp->Assign(runtime->GetCalleeSaveMethod(Runtime::kRefsOnly));
62  uint32_t return_pc_offset = GetCalleeSavePCOffset(kRuntimeISA, Runtime::kRefsOnly);
63  uintptr_t* return_pc = reinterpret_cast<uintptr_t*>(reinterpret_cast<byte*>(sp) +
64                                                      return_pc_offset);
65  CHECK_EQ(*return_pc, 0U);
66  self->SetTopOfStack(sp, 0);
67  self->VerifyStack();
68  instrumentation::Instrumentation* instrumentation = Runtime::Current()->GetInstrumentation();
69  TwoWordReturn return_or_deoptimize_pc = instrumentation->PopInstrumentationStackFrame(
70      self, return_pc, gpr_result, fpr_result);
71  self->VerifyStack();
72  return return_or_deoptimize_pc;
73}
74
75}  // namespace art
76